Steam-boiler.



Patented Mar. 7, 1911'. 4 SHEETS-+SHEET 1.

STEAM BOILER.

APPLICATION run we. 16. 1910.

zziiiiziitttjj mm; TOR .Jfz'zzoitWSewaZl M. W. SEWALL.

STEAM BOILER. PILIOATION FILED AUG. 16, 1910.

Patented Mar. 7, 191 1.

4 SKEETS-SHEET 3 WITNESSES er I mag/ 5% M. w. SBWALL. STEAM BOILER.APPLIOATIOR FILED AUG. 16, 1910. 986,090., v Patented Mar. 7, 1911.

4 SHEETS-BEBE? 4.

IIIWIIPIII MIIIIIIIIIIMIUIIII WITNESSES HINIIENTOR I BY AITORNEY? NITEDSTATES PATENT OFFICE.

, MIN OTT W. SEWALL, OI ROSZLLE, NEW JERSEY, ASSIGNOB TO THE B ABCOCK &WILCOX COMPANY. OF BAYONNE, NEW JERSEY. A CORPORATION 01 NEW JERSEY.

STEAM-BOILER.

986,090. Specification of Original application filed June 12. 1909.Serial m. 501.751.

1910. Serial No. 577.480.

To all whom it concern:

Be it known that I. Mixo'r'r W. Sruzum,

a citizen of the United States. residing at V of Lpmn and StatellN'tfltQtl certain new 14) 'June 12, 1909, for steam-boilers.

The object of this invention is to produce a water tube steam boilerhaving the essential features of the inclined type of water "tubeboiler, asregards position of tubes, po

sition of headers and circulation of water' and steam, which can bebuilt at a reduced The circulation of water in an inclined tube boileris upwardly through the inclined tubes and the uptake manifolds to ahorizontal drum or horizontal circulating tubes,

, through such drum or circulating tubes to. I the opposite end of theboiler and down thro the connections between the horinon cinmilati tubesor drums to the downtake manifo ds, and thence into the inclined watertubes. Such boilers are usually formed of straight tubes expanded intosub- 'stantially vertical sinuous headers or into water legs formed ofstayed flat surfaces I with suitable drum connections at their up- .perends. There is laced o posite each tube in the manifol s a h old fittingfor I access to the tube ends, both for the expansion of the tubes inthe headers and for the a -purpose of cleaning. To enable this tvpc oboiler to be more economically-built 1 proride large manifolds for-the-in- I Y sertion of the tube ends of such dimensions" that a man canenter the manifold itself through a manhole to perform the work ofexpansion from the interior. The use of a y indrical tube sheet, that isthe portion of the manifold in which the tube holes are bored. compelsthe bending of the tube ends to such form as will permit them tacnterthe tube sheetrad' y. It is desirab in 7 this class of boiler that asu'n'icient quanti f of water be contained in the immediate .vi cinityof the water line so that an apprech able time may be required to causea reasonablevariation in the water line; inord'er that such i'ariationmay occur without danger of burning the tubes forming the heating 9 tionof theystem may be thereby My invention will be understood by ref-LettersPatent. Patented Mar. 7, 1911'. Divided and this applicationtiled August 16,

surface of the boiler. To obtain this desirable water volume thedowntakemanifold is extended upwardly and made of a larger diameter thanthe manifold proper. By this means the necessity of the usual horizontaldrums or cross drums, of the so-called horizontal and cross drum type ofboiler, ma be eliminated and the expense and com icaneed.

erence to the accompanying drawings in which- Figure 1 is a sideelevation of the boiler and its setting; Fi 2 a transverse section onthe plane of the inc 2-2 looking toward the .rear of the boiler; Fig. 3a horizontal section on the plane of the line 3-4; of Fig. 2; 4 ahorizontal section on the plane of the line 4-4 of Fig. 1; Fig. 5 a sideelevation of a modification; F' 6 atransverse tion on the plane of theline of Fig. 5z'aud Fig. 7 a horizontal section. on the plane of theline 7-? of Fig. 5.

Similar reference numerals indicate similar parts in the several views.

Referring to the drawings, the numeral 1 designates the uptake manifoldand 2 the downtake manifold, the latter having an enlarged upwardextension 3. The mani folds are connected by inclined water tubes -1which form the heating surface of the boiler, and by the-substantiallyhorizontal ulirlrard extension 3 of the downtake mamfo InFigs. 1, 2 and 4 I have shown superheating tubes (i'having manifolds 7,8, 9 and 10. The manifold 7 isconnected to the extension?! by a nipple11, and 8 and 9 are connected together by nipple 12. The manifold 10terminates at its upper end in a steam flange 13.

The boiler is iirwl from a-furnace 14 having a bridge wall 15,acombustion chamber 16, and a wall 17 for deflecting and the furnaceases, said wall 17 ha e openings 18 for fhepassageof the gusts gh Thefurnace and combudion chamber liege a roof Ill-extending rearwardly ofthe roof admitting the furnace to the boiler tubes 4;. The diaphragm 22extends forwardly from the rear wall toward the walliL the opening 20 inthe rear of said tubes 5 and the tube5 which connect the upper end of.the uptake manifold with theuptake manifold ,and forms with the roof l9and the side walls of the furnace a pass 21 in which the lower tubes ofthe bank 4 are placed. The diaphragm 22 terminates a Sutlicient distanceto the rear of manifold 1 to provide air opening 23 to admit the gasesto the upper tubes of the bank 4, said opening exten for only a part ofthe width of the boiler, as shown in Fig. 4. A vertical wall 25 extendsfrom diaphragm 22 to a roof 24 formed of-bri'cks laid on the top tubesof the bhnln The roof 24 extends from manifold 1 rearwardly to manifoldbracket 34 manifoldg'the work of Ming-done from the forming withdiaphragm 22 and vertical wall 25 two passes 27 and 28 among the uppertubes of the bank. Pass 27 is connected with 21 by opening 23, and with28 by the opening 29 at the rear of wall 25. A connection to a flue maybe made through opening 30 from pass 28. Bv this, arrangement threepasses are obtained among the boiler tubes of approximately the lengthof the tubes. and approximately proportional in cross section to the gasvolumes due to the temperature in the difierent parts of the boiler.

At the front of the boiler between manifold I and the. side walls aredoors 31 for access to the interior of the setting for the renewal oftubes and for cleaning the exterior of the heating surfaces. At the rearthe wall is built from the floor line up to the roof 22 of; the pas 21.Above this wall I provide doors 38 by which access may be had to thetubes for cleaning and to the manifolds of the super-heater tubes. Asshown in the drawings the outer tubes are bent from the center-line ofthe two inanifolds to the extent that the spaces between the side wallsof the boiler are greater than the manifolds, and substantially filledwith tubes- This cebetween the sidewalls and manifolds is th convenient:for cleaning and the removing of tubes in case of repair. The weight ofthe rear manifoldis carried on beams 32 through the saddle 33, the

serving not for carrying the weight but for stability of the structure.A semi-dmular wall 87 protects the lower end of the reai' manifold andallows access to the lowest point of the manifold for a blow-61fconnection 39. The front. mmifcld 1 is supported on the small structuralframe a a s am.

c early s on in a rtion of each of the manifolds yond the boiler settingand by doing an econmiy m Selling material and labor is ob tained. Theexposed portions of the manifoltk will, however be with suitablenon-conducti material to prevent radiation of heat. 7 each manifold is amanhole 1 for entrance to the the tubes e A .connection properly covered40 will be provided for introducing the feed water into the rearmanifold at a short distance below the water line, such line beingthrough the center of the tubes Connections will also be made for theother necessary auxiliaries for a steam boiler.

The boiler shown in Figs. 5; 6 and 7 is adapted to the usual forms ofsettings of furnaces used for inclined water tube boilcrs. One featureof the construction shown in this particular setting is that ampleaccess for cleaning the exterior of the tubes may be had through thedoors 31 at the front, and 3S.at the rear, so that balilcs 42 parallelto the tubes may be used with the possibility of completely cleaning thetube surfaces. The manifolds may be supported in substantially the sameiuanucr as before described, although in the present instance I haveshown the rear manifold of Fig. 5 as supported -on a circular metal base43 resting on suitably prepared foundations. The front manifold may reston a metal base properly supported on structural work so as to giveaccess to the furnace front, or it may be suspended to a frame ofstructural work ssing over-the top of the manifold as in 1g. 5.

In the form shown in Fig. 5 the tubes .4 must enter the manifolds atright angles to their vertical axes and this requires that the tubes. bebent in more than one plane. That is in the construction. of Fig. 5 thegeneral axis of each of the tubes extendsatan angle other than a rightangle to the axes of the manifolds, while the tube itself enters themanifolds radially and at right angle to the takes of the manifolds.In'Fig.

1, however, with the manifolds slightl inclined the tubes arebent onlyin one p aue; that with inclined manifolds the gen 4 eral axis of eaclitube extends at a rightangle to vtheaxesfof' the manifolds apd the tubesenter the manifolds radiall By substantially vertical, therefore, etherin the 'fication or claims, I desire to include the slightly inclinedsetting of the manifolds shown-1n 1. Both the uptake and downtakemfinifo ds may be made of ap rcximately the same length, and the bofiermay be supplied with' a cross drum with tube connections between it andthe vertical manifold, as is customary for cross drum boilers of theinclined water tube type, or-a horizontal placed above the manifolds andsuitably connected by nipples as in the horizontal longitudinal drumtype of inclined water tube boilers. In fact these manifolds are tibleof ads tion to many of the 125 usufl forms of inc ed water tube boilersnow in the market; For thep'urpose of replacing or repairing tubes it isthat.

a verticalspaceflsballexistad acentto each horizontal row of tubes 4 byinaking lougitudinal'drum mav be 45 ldwer of the doWntake liianifold,and

: clm'ed tubes arranged'i'n verticalrows hat-'- 50 in horizontal 'natelygreater and less than twice a tulxdi- 3 l lnet efg'ftheends of-sai dtubes being so bent i asto' enter radially the tube sheet of in lined '3,of the ItubeLsheets. m1- of alternate vertical spaces between thehorizontal rows of tubes respectively greater and less than the diameterof a tube, as shown till-11! and 50 in Fig. 2, v ,5 The tube 5'connecting the steam spaces in the" manifolds rovides a direct passage"for the steam to t e steam drum and leaves the pipe 5 freefora-Avaterpassage. \Vh'at I claim and desire-to secureby Lettcrs Patent of theUnited States is I 1. A steam boiler hating an inclined bank of tubes,an uptake manifold of uniform diameter throughoutits lenfithlzaadon'ntake manifold having an upper'e'y ricalseetion 15 of substantiallyreater diameter than the lower section, am a main steam outlet connectedto the upper section oi-tlie downtake manifold, said tubes beingbentiaft their ends I and expanded intq the u ke'manifold andthe lowersection'of the' wntgke rnanifoldi 2. A steam boiler comp uptake'anddowntake cylindrical manifolds, heat' tubes into manifolds, the en ofthe tubes best so astnenter themanif olds radially in peimitting therebyall of the tubes tobeexpa'nded into the lube .of the manifolds in aninclined bank of substantially grexater width than the ofthemanifods. 03. A steam boiler having a bank of inclined'heating tubafmanifoldseachhaving a. section of equaladaptd to. re oeite theends of of said mnni-'folds an up 'sectionofjgreater dithan'the tu section, said bank of ofgreater widtl than thetube-receiving section;

4. eomprisinga f j ee ndi l 93'- v seem a upper of greater diameter thanthe layer. section, said tubes be ng into the uptake manifold and theeir'eulation tubgi the npperends 5- Asteamfboil'erhaving-a bank-ofmcent'er distances of substan- ,y twice a tube dianieter and horizontalfiniyshaying vertical center distances alter-1 manifoldseylintlriml informand of uni; forlnfliameterthroughout at'lea'st the. length v adiameter sulr .j sta nti ally' i idth of the bank of Anemone eampnansubainiiil ;tiall v vertical uptake opening in said second baflleextendi jeyitofthegases. 8. A steam boiler comprising substantially saidmanifolds, a bflle throuqh' the'second ballle.

and batiie extending don'ntake above a portion of the tubes. and

vertical wall dis tion of the tubes and resting-upon -forwardly from the'dle baflle and extending rearwardly the uptake.

EA steam boiler and downtake mani, folds,inclined tubes comprisingsubstimL e;--. connecting said manifolds, a baflle supported by thelower tubesand extending I p a second bailie extending forwardly fromthe downtake above a portion of the tubes, an a por tion of the width 6fthe boiler and at the frontends of the tubes-a third baflle extlendingfrom the uptake to the downtake an supported on the tubes, a vettiealwall disposed'axnong the upper portion of "the tubs and resting uextending rearward y from the uptake manifold and dividing the spamiddle and upper baflles'into two passages extending the third bafllehaving an opening located in the rear of the uptake manifold to, permit,the

vertical manifolds, inclined tubes connecting said manifolds, a baffle"Supported by lower tubes andextendin'g'from 'one manifold to-- ward theother a second bafile supported by intermediate tubes and extending fromone manifold totheother and tubes 'andlextending from one manifol theother,- and. a tert ical wall disposed among the upper tubes. andresting upon the'niiddle bame and'exte'nding-in the same'directioi as:9, Asteam boiler eomprising substantiallyvcrtiml manifolds. inclinedtul'ies connecting supported by lower tubes and extending from onemanifold to wardthe otheig'a second .bafllesupported by intermediatetubes-and extending from one manifold "to the other and having an open-'ing therein, a third baflle supported by upper tubes and extcndin'gfmm, one manifold tothe other. a vertical wall dispoad among the uppertube-sand wsting upon the middle bathe and extending: in the samedirection as'the first-named ltllllfi said upper bame hating an openingthen-in on the opposite side of the vex-tits! afile from the opemng 10.n a water tube boiier. two parallel inclined cylimlricalmani folds. aplurality of rows ofin'clim-d wat r! ubes manta-ting said manifolds thegeneral axis at Qilffll of said tubes extending at a 1- lit-anglito theaxis ofeach'lnanifold andi manifolds radially.

ce between the length of the tubes and said e tubes-entering therearnrardly from the -uptake-,-Q

n the middle baflle and i girl hitting an open- 7 therein, athird'baflle supported by 11. In a water tn'be b0 -clined cylindricalmanifolds,

5 a plurality of rows of inclined water tubes connecting sa ofwach ofsaid tubes iler, two parallel inf one of said-f water chamber, of eachmanifo d and manifolds radially,

id manifolds, the general axis;

extend at a rightangle to the axis of eaeh manifold and the ffilm-entering l 0 horiadntal circulation tubes upper. d5 of themanifolds.

the manifolds 12.- a water tubeboiler, manifolds,

connecting the radially, and

two parallel a plurality of rows of inclined water tubes connectinp saidmanifolds, the general axis of each 0 said tiibes extendin at aright-angle to the axis and a pipe connecting said manifolds above thewater line.

In testimony whereof I have hereunto signed my name in the presence oftwo subscribing witn MINOTT W. SEWALL. Witnesses:

B. Pn'n-msox, E- P. TERRY.

e tubes entering the.

